JPH0333422B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to rolls used in twin-roll continuous casting machines.

In recent years, various methods (twin roll method) of continuously casting a strip plate using a twin roll type continuous casting machine have been proposed. Continuous sheet casting using this twin roll method was the first
To explain with a diagram, cooling rolls a and b whose inner surfaces can be water-cooled are arranged horizontally and in parallel,
The cooling rolls a and b are rotated by a required drive device while continuously supplying molten steel d into a barrel formed by a barrel seal c and a side seal (not shown) on the cooling rolls a and b, The solidified layer e formed by being cooled by the surfaces of the cooling rolls a and b is pulled out from between the cooling rolls a and b in the form of a plate. In this way, strip-shaped plates f are continuously cast.

Currently, in the above-mentioned twin roll method, a problem arises in that the product has a thickness distribution in the longitudinal direction and a thickness distribution in the width direction, resulting in a decrease in quality.

In view of the above, the present invention has been made in order to provide a casting roll whose roll crown can be arbitrarily changed and whose thickness distribution in the longitudinal direction and thickness in the width direction of the product can be corrected.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows the present invention, in which a cooling water passage 1 is provided at both ends of a body part 2 spirally provided on the surface side, and the cooling water passage 1 becomes narrower as it approaches the center of the body part 2. Piston sliding spaces 3 and 4 are provided which are continuous in an annular manner along the inside of the piston sliding spaces 3 and 4.
Annular taper pistons 5 and 6 are slidably provided on the pistons. A piston hydraulic fluid oil passage 7 is communicated with the central end of the body of both piston sliding spaces 3, 4, and the central end is used as a hydraulic chamber 9, 11, respectively, and both piston sliding spaces 3, 4 An oil passage 8 for piston hydraulic oil is communicated with the end of the body of the cylinder, and the oil passages 7 and 8 are connected to a rotary joint 13 at the end of the roll shaft. Hydraulic piping 14,1
5, the roll shaft portion is rotatably supported by a bearing 16, and a driving spindle 17 is connected to one end of the roll shaft. Hydraulic piping 14,1
5 communicates with a hydraulic pump 19 or an oil tank 20 via a control device 18, and the control device 18 switches the flow direction of hydraulic oil in the oil passages 7 and 8, and the taper pistons 5 and 6 are moved in opposite directions by the hydraulic pressure. The roll crown can be changed as appropriate by moving the roll crown in the direction of the roll crown and expanding or contracting the surface of the body part 2 by a wedge action. The relationship between the movement of the taper pistons 5 and 6 and the roll crown is, for example, when the taper pistons 5 and 6 move toward the end of the body, they assume the crown shape shown in FIG. 3A, and when they move toward the center of the body, they assume the crown shape shown in FIG. It becomes a crown shape as shown in C, and when moved to the above-mentioned approximately intermediate position, it becomes a flat shape as shown in FIG. 3B.

Further, when communicating with one end of the cooling water passage 1, a water passage 21 and a water passage 22 communicating with the other end of the cooling water passage 1 are connected to water hoses 23 and 24 via a rotary joint 13.
After cooling water is sent to one water hose 23 and passed through the cooling water flow path 1, it is collected from the other water hose 24.

By incorporating a cooling roll whose roll crown can be changed arbitrarily into a twin-roll continuous casting machine and performing casting while changing the roll crown as necessary, the longitudinal plate thickness distribution can be improved. Also, the thickness distribution in the width direction can be corrected, and a plate with a uniform thickness can be produced.

Note that the present invention is not limited to only those shown in the above embodiments; for example, the piston sliding space may be made gradually wider toward the center of the body;
Can be used for cooling rolls in horizontal continuous casting equipment and various types of twin roll continuous casting equipment;
It goes without saying that various other changes may be made without departing from the gist of the present invention.

According to the present invention, as described above, since the roll crown can be changed arbitrarily, it is possible to achieve the excellent effect of correcting the thickness distribution in the longitudinal direction and the thickness distribution in the width direction of the product.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the state of casting by the twin roll method, Fig. 2 is an explanatory diagram showing an embodiment of the present invention, and Fig. 3 is an explanatory diagram showing the casting state by the twin roll method.
Figures A, B, and C are explanatory diagrams showing roll crowns. 1... Cooling water channel, 2... Body, 3, 4... Piston sliding space, 5, 6... Taper piston,
7, 8... Oil passage for piston hydraulic oil, 9, 10, 1
1, 12... Hydraulic chamber, 25... Board.

Claims (1)

[Claims] 1. An annular tapered piston is slid on both ends of the body with a cooling section on the surface side, in a piston sliding space that becomes narrower or wider as it approaches the center of the body and continues in an annular shape along the inside of the cooling section. A piston working fluid flow path that is freely provided and communicates with the center end of the body of both piston sliding spaces, and a piston working fluid flow path that communicates with the end of the body of both piston sliding spaces. A casting roll characterized by: